Properties of Obsidian lan Comendite
ukuran gandum
-
grained medium
rengat
conchoidal
mrembet
porosity
banget kurang keropos
Highly keropos
tartamtu gravitasi
2.6-2.7
2.38
Kapadhetan
2.6 g / cm 3
-9999 g / cm 3
resistance
tahan panas, impact tahan
tahan panas, impact tahan